Process of manufacturing hollow glass articles.



Patented Apr. I6, l90l.

P. T SIEVERT. PROCESS OF MANUFACTURING HOLLOW GLASS ARTICLES.

(Application filed Feb. 6, 1900.)

(No Model.)

W, L W W W IL u If jnmvzion fizw W T nanms Perms no. mo'mumo. WMNINOTDN.u. a.

UNITED STATES PATENT OFFICE.

PAUL THEODOR SIEVERT, OF DRESDEN, GERMANY.

PROCESS OF MANUFACTURING HOLLOW oLAss ARTICLES.

SPECIFICATION forming part of Letters Patent No. 672,153, dated April16, 1901.

Original application filed January 31, 1899, Serial No. 704,054. Dividedand this application filed February 6, 1900. Serial To aZZ whom it mayconcern.-

Be it known that LPAULTHEODOR SIEVERT, a subject of the King of Saxony,and a resi: dent of Dresden, in. the Kingdom of Saxony, in the GermanEmpire, have invented a new and useful Improvement in Processes ofManufactu ring Hollow Glass Articles, of which the following is aspecification.

The invention which constitutes the present improvement is based uponthe process of manufacturing hollow glass articles which is thesubjectpf my United States Patent No. 651,059, dated June 5, 1900.

There are certain hollow glass articlesbottles, for examplewhich itwould be, if not impossible, at least impracticable or very difficult toproduce entirely by a single operation of that process, and to providefor the employment of the process in the manufacture of such articlesthe present improvement consists in first obtaining a bottomless glassbody by any meansthe said process,

for example-andthen according to said process spreading out a liquidglass mass into a layer and while said layer remains molten or plasticplacing upon it the edges of said bottomless body and blowing up saidmolten or plastic layer against and within said edges, thereby forming abottom to said body while the so-formed bottom is united with the body.

by the heat of the molten or plastic layer.

The improvement is illustrated by the accompanying drawings, whichrepresent apparatus for first manufacturing according to said patentedprocess hollow bodies constituting each the walls and neck of a bottleand afterward manufacturing by the same process the bottoms therefor,the walls being united with the bottoms by the act of manufacturing thelatter. Figure 1 represents a vertical section of a hollow perforatedslab or plate upon which the molten glass for performing either of thetwo operations above mentioned is spread and from which the said glasswhile plastic is to be blown into shape by the elastic pressure medium;Fig. 2, a vertical section of the said slab having placed upon it moldsinto which the plastic glass is blown from the slab to form hollowbodies each of which comprises the body and neck of a bottle without thebot- (No specimens.)

valve for the regulation of the tension of the elastic pressuremedium-steam, air, or gas which is admitted to said cavity and whichissues therefrom through the perforations a in the upper surface of theslab 0t for the purpose of blowing up the layer 0, of molten or plasticglass, deposited and evenly spread on said surface, while the said layeris held and confined to the said slab by the sharp edges of the molds g,(see Fig. 2,) which-are placed on the said layer. These molds have theform of the bodies and necks of bottles, and when the glass of the layere is blown into them by the elastic pressure medium issuing through theperforations a of the slab a there is produced in each a bottomlesshollow body h, having the contour of a bottle such as is shown detachedfrom its mold in Fig. 2. In this operation there will be a blowoverabove the open top of the mold, and this blowover, which Will generallybe burst open in the form of a frill, is to be trimmed off.

To prepare for the manufacture of the bottoms 1 of the bottles and theirattachment to the bottomless hollow bodies h, the said bodies areremoved in the molds from the slab a and the surplus glass of the layere, which surrounds the lower edges of said bodies, is trimmed 01f by anysuitable means known to glass-blowers. The molds g and the hollow bodiesh within them are then placed upon a second layer 6 of molten glasswhich has been spread on another perforated slab a like that firstdescribed, and the blowing up of said second layer 6' by the elasticpressure medium in the manner described with reference to the first oneforms the bottoms i of the bottles, which are at the same time welded toor united with the lower edges of the bodies h, as shown in Fig. 5, bythe heat of the glass of the layer e. The molds with the formed andbottomed bottles are then removed from the slab a, and on the surplusglass of the glass layer 6 having been trimmed off the bottles are leftseparated and complete, as shown in Fig. 5.

To insure the perfect union of the bottoms with the bodies of thebottles, the two blowing operations described should be performedwithout intermediate delay.

It may be hardly necessary to mention that in the manufacture of manyarticles by this process, such articles, for example, as the bottlesrepresented, the molds 9 should be of two partsseparable on suitablelines, as indicated atj, for the removal of the blown articlestherefrom.

What I claim as my invention is- The improvement herein described inprocess of manufactu ring hollow glass articles con sisting in firstobtaining a bottomless hollow glass body, next spreading out a liquidglass mass into a layer, then While said layer remains molten or plasticplacing upon it the edges of said bottomless body, and finally blowingout a portion of said molten or plastic layer against and within saidedges and thereby giving form to the said portion while it and the saidbody are welded together by the heat of said layer.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 24th day of J anuary, 1900. 7

PAUL THEODOR SIEVERT.

Witnesses:

HERNANDO DE Soro, PAUL ARRAS.

